Not pervious; not admitting of entrance or passage through; as, a substance impervious to water or air.
Not permeable; not permitting passage, as of a fluid. through its substance; impervious; impenetrable; as, India rubber is impermeable to water and to air.
Not pervious; not admitting of entrance or passage through; as, a substance impervious to water or air.
Not permeable; not permitting passage, as of a fluid. through its substance; impervious; impenetrable; as, India rubber is impermeable to water and to air.